Blender equivalent of zremesher?
There is a ZRemesher port for Blender available as a paid plugin, made by the original author of Zbrush's ZRemesher. Free demo version is available and you have a month to evaluate it yourself. As far as I tested it, it's a real deal, working quickly and resulting in a nice topology (for an automated tool).

https://exoside.com/quadremesher/

https://www.blendernation.com/2019/10/08/quad-remesher-auto-retopology-add-on-released-for-blender/


  The French software developer Exoside has released a Blender add-on version of their new Quad Remesher auto-retopology tool. Quad Remesher is based on the renowned ZRemesher in the ZBrush 3D sculpting suite, and comes from the same coder, Maxime Rouca.